CN219129122U - Double-shaft paddle mixer - Google Patents

Abstract

The utility model provides a biax paddle mixer is used for improving the condition that the stirring piece of two (mixing) shafts bumped, biax paddle mixer includes two (mixing) shafts, engine and gear reducer, the rotation output of engine passes through the gear reducer is transmitted respectively to two (mixing) shafts.

Description

Double-shaft paddle mixer

Technical Field

The utility model relates to mixing equipment, in particular to a double-shaft paddle mixer.

Background

The two stirring shafts of the double-shaft paddle mixer need to keep a certain phase difference, stirring pieces on the two stirring shafts are staggered, friction between the stirring pieces of the two stirring shafts is avoided, the two stirring shafts are driven to synchronously rotate through a chain transmission device, sliding teeth can be formed on the chain transmission device, the phase difference of the two stirring shafts is changed, and friction between the stirring pieces of the two stirring shafts is caused.

Disclosure of Invention

The utility model aims to provide a double-shaft paddle mixer which is used for improving the collision condition of stirring pieces of two stirring shafts.

According to an embodiment of the present utility model, a dual-shaft paddle mixer includes two stirring shafts, an engine, and a gear reducer through which rotational output of the engine is transmitted to the two stirring shafts, respectively.

In one or more embodiments, the gear reducer is a direct drive reducer.

In one or more embodiments, the dual-shaft paddle mixer further comprises a barrel comprising an end plate provided with a stiffener.

In one or more embodiments, the dual-shaft paddle mixer further comprises a barrel comprising a base plate provided with a stiffener.

In one or more embodiments, the dual shaft paddle mixer further comprises a crusher comprising a crushing hood provided with crushing bars and a crushing shaft.

In one or more embodiments, the crushing shaft is provided with a screw belt at both ends, the screw belt being screwed in the same direction as the rotation direction of the crushing shaft.

In one or more embodiments, the crushing hood is rotatably fixed.

In one or more embodiments, the dual-shaft paddle mixer further comprises a barrel providing a gravity-free mixing space above the middle of the two stirring shafts; the two stirring shafts are provided with paddles.

In one or more embodiments, the gravity-free mixing space narrows from bottom to top in a cross-section perpendicular to the two stirring shafts.

In one or more embodiments, the wall of the gravity-free mixing space is at an angle of 50-60 ° to the horizontal.

The embodiment of the utility model has at least the following beneficial effects:

the engine stirring shaft is driven by the gear reducer, the gear engagement and the transmission are stable, the phase difference of the two stirring shafts is ensured to be unchanged, and the friction of stirring pieces of the two stirring shafts is avoided.

Drawings

The above and other features, properties and advantages of the present utility model will become more apparent from the following description in conjunction with the accompanying drawings and embodiments, in which:

FIG. 1 is a front view of a dual-shaft paddle mixer;

FIG. 2 is a left side view of a dual-shaft paddle mixer;

FIG. 3 is a top view of a dual-shaft paddle mixer;

FIG. 4 is a left side cross-sectional view of the cartridge;

FIG. 5 is a left side cross-sectional view of the stirring shaft and the barrel;

FIG. 6 is a top cross-sectional view of the stirring shaft and the barrel;

FIG. 7 is a front cross-sectional view of a seal structure of the stirring shaft;

FIG. 8 is a schematic view of the structure of the discharging device;

FIG. 9 is a schematic view of the construction of the service device;

FIG. 10 is a left side view of the crusher;

FIG. 11 is a front view of the crushing shaft;

FIG. 12 is a bottom view of the crush can;

fig. 13 is a left side view of the gear reducer.

Reference numerals:

1-a cylinder;

2-a stirring shaft;

3-stirring piece;

4-a gear reducer;

5-an engine;

6-bearing seats;

7-sealing means;

8-an oil cup;

9-packing;

10-an air tap;

11-oil seal;

12-shaft sleeve;

13-stirring sheets;

14-a discharging device;

15-a discharge door;

16-cylinder;

17-overhauling devices;

18-an access door;

19-turning the handle;

20-locking;

21-a travel switch;

22-top cover;

23-exhaust port;

24-a feed inlet;

25-end plates;

26-a bottom plate;

27-a second stiffener;

28-support;

29-a crusher;

30-a crushing cover;

31-crushing shaft;

32-breaking needle;

33-arc grooves;

34-crushing the rod;

35-helical ribbon;

36-gravity-free mixing space;

37-wall surface;

38-input bevel gear;

39-a drive shaft bevel gear;

40-intermediate wheel;

41-input shaft.

Detailed Description

Reference now will be made in detail to embodiments of the utility model, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation, not limitation, of the utility model. Indeed, it will be apparent to those skilled in the art that various modifications and variations can be made in the present utility model without departing from the scope or spirit of the utility model. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. Accordingly, it is intended that the present utility model cover the modifications and variations of this utility model provided they come within the scope of the appended claims and their equivalents.

It is noted that these and other figures are merely examples, which are not drawn to scale and should not be construed as limiting the scope of the utility model as it is actually claimed.

The terms "first," "second," and the like may be used interchangeably to distinguish one feature from another and are not intended to mean that the various features must be located in the positions shown in the various embodiments.

Fig. 1 shows a front view structure of a dual-shaft paddle mixer, fig. 2 shows a left view structure of the dual-shaft paddle mixer, and fig. 3 shows an attached view structure of the dual-shaft paddle mixer. As shown in fig. 1 to 3, the twin-shaft paddle mixer includes a cylinder 1 and a stirring shaft 2. Fig. 4 shows a left-hand cross-sectional structure of the cylinder 1, and fig. 5 shows a left-hand cross-sectional structure of the cylinder 1 and the stirring shaft 2. As shown in fig. 5, the number of stirring shafts 2 is two. Fig. 6 shows a top cross-sectional structure of the drum 1 and the stirring shaft 2. As shown in fig. 6, two stirring shafts 2 are parallel to each other and extend in the longitudinal direction, the middle section of the stirring shaft 2 is located in the cylinder 1 and provided with stirring members 3, and both ends of the stirring shaft 2 extend out of the cylinder 1. With continued reference to fig. 1 to 3, one end of the stirring shaft 2 is connected with a gear reducer 4 outside the cylinder 1, the gear reducer 4 is further connected with an engine 5, the engine 5 outputs rotation, the gear reducer 4 simultaneously transmits the rotation of the engine 5 to the two stirring shafts 2 respectively, the two stirring shafts 2 are driven to rotate in opposite directions, and the stirring piece 3 stirs materials of the cylinder 1 to realize material mixing. Fig. 13 shows a left side view of the gear reducer 4, wherein the housing of the gear reducer 4 is transparently displayed to show a transmission structure inside the gear reducer 4, further referring to fig. 13, the rotational output of the engine 5 is transmitted to the input bevel gear 38 of the gear reducer 4, the input bevel gear 38 is meshed with the drive shaft bevel gear 39, the angle of intersection of the input bevel gear 38 and the drive shaft bevel gear 39 is 90 degrees, the rotational input of the engine 5 in the vertical direction is changed into the rotational output of the engine in the horizontal direction, the input bevel gear 38 is positioned by a shaft snap spring, the drive shaft bevel gear 39 is simultaneously meshed with two groups of reduction gear sets on both sides respectively, the two groups of reduction gear sets are respectively meshed with the gears of the stirring shafts 2, the stirring shafts 2 are inserted into the inner holes of the gears of the stirring shafts 2 and are connected in a key way, the keys on the two stirring shafts 2 have an initial phase difference, the engine 5 output rotationally drives the main gear of the gear reducer 4 to simultaneously drive the two groups of reduction gear sets to rotate, and then simultaneously drive the two stirring shafts 2 to rotate, the two groups of reduction gear sets have the same speed ratios so that the rotational speeds of the two stirring shafts 2 are the same, the two stirring shafts 2 are kept unchanged, the initial phase differences of the two groups of reduction gear sets are different, and one of the two groups 40 of reduction gear sets are rotated in opposite directions. The engine 5 and the stirring shafts 2 are driven by the gear reducer 4, the gear engagement and the transmission are stable, the phase difference of the two stirring shafts 2 is ensured to be unchanged, and the friction of stirring pieces 3 of the two stirring shafts 2 is avoided. In addition, for the mixed scene of building materials (such as dry powder mortar) with high material specific gravity and high friction coefficient, the cycloidal pin gear speed reducer has low transmission efficiency, the transmission power factor is about 0.6, the capability of driving the stirring shaft 2 is poor, the power loss of the gear speed reducer 4 in transmission is small, the loss of each stage is about 5%, the transmission power factor is more than 0.9, the transmission efficiency is high, and the capability of driving the stirring shaft 2 is improved.

With continued reference to fig. 1, in the illustrated embodiment, the other end of the stirring shaft 2 is fixed in a bearing seat 6 with a tight sleeve by a bearing, and the bearing seat 6 with the tight sleeve locks the stirring shaft 2, reducing axial displacement of the stirring shaft 2.

Fig. 7 shows a front cross-sectional view of the sealing means 7 of one end of the stirring shaft 2, the stirring shaft 2 being provided with the same sealing means 7 at the other end. As shown in fig. 7, in the illustrated embodiment, the sealing device 7 is a lip type mechanical sealing device, and as shown in the chinese patent application publication No. CN208169526U, the oil cup 8 sufficiently lubricates the packing 9 on both sides of the oil cup and the stirring shaft 2, and performs a good cooling function during the rotation of the stirring shaft 2, the air tap 10 is provided with an air source by an external air compressor, and the air pressure is sealed in the cavity between the oil seal 11 and the packing 9. The lip type mechanical sealing device has better sealing effect, and when the double-shaft paddle mixer is used for mixing powder such as dry powder mortar, dust leakage is effectively prevented, and the problem of dust leakage of the filler sealing device can occur.

With continued reference to fig. 7, in the illustrated embodiment, the stirring shaft 2 is sleeved with sleeves 12 at both ends, the sleeves 12 being fixed to the stirring shaft 2 by set screws, and rotating synchronously with the stirring shaft 2, protecting the stirring shaft 2 from abrasion of the stirring shaft 2. When the shaft sleeve 12 is worn, the shaft sleeve 12 is independently replaced, so that the maintenance and replacement are convenient, the cost is low, and the utilization rate of the double-shaft blade mixer is improved.

With continued reference to FIG. 1, in the illustrated embodiment, the engine 5 is an electric machine. In another embodiment, the engine 5 is another power machine, such as a diesel engine.

With continued reference to fig. 2, in the illustrated embodiment, the gear reducer 4 is a direct connection reducer, the engine 5 is directly mounted on a housing of the gear reducer 4, an output shaft of the engine 5 is directly inserted into an inner hole of the input shaft 41 and is connected in a key manner, an opening of the inner hole of the input shaft 41 is located at one end of the input shaft 41, the input shaft 41 is connected with the input bevel gear 38 at the other end, the input shaft 41 is mounted in a bearing seat by a bearing, and is located in a housing of the gear reducer 4, and the opening of the inner hole of the input shaft 41 exposes the housing for plugging of the output shaft of the engine 5. The gear reducer 4 has small outline dimension, only two stirring shafts 2 are exposed, the sealing position is few, oil leakage is easy to control, and the service life is prolonged.

With continued reference to fig. 6, for a mixing scenario of building materials (such as dry mortar) with high material specific gravity and high friction coefficient, the abrasion of the stirring piece 3 is large, in the illustrated embodiment, the stirring piece 3 comprises the stirring piece 13, the stirring piece 13 is detachably fixed through the threaded fastener, the materials are stirred, the stirring piece 16 can be independently replaced when the stirring piece 16 is abraded, and maintenance is convenient.

With continued reference to fig. 6, in the illustrated embodiment, the stirring member 3 is made of a high hardness wear resistant material, illustratively a high manganese alloy cast steel, to enhance service life.

With continued reference to fig. 2, the dual-shaft paddle mixer further includes a discharge device 14, the discharge device 14 being located at the bottom of the bowl 1. Fig. 8 shows the structure of the outfeed device 14. As shown in fig. 8, the discharging device 14 includes a discharging door 15, where the discharging door 15 is illustratively an arc door, and its length is 80% of the length of the barrel 1, and the discharging hole is large, so that the discharging efficiency is improved, and dead materials in the barrel 1 are reduced.

With continued reference to fig. 8, in the illustrated embodiment, the opening and closing of the discharge gate 15 is controlled by two cylinders 16, the two cylinders 16 providing sufficient force to cause the discharge gate 15 to closely conform to the discharge port, sealing the discharge port against leakage of material within the bowl 1.

With continued reference to fig. 1, in the illustrated embodiment, the dual-shaft paddle mixer further includes an access device 17, the access device 17 is located at the upper portion of the barrel 1, the access device 17 includes an access door 18, the access door 18 is covered, and maintenance, maintenance and cleaning can be performed on the interior of the barrel 1 through the access door, so that operation is facilitated.

Fig. 9 shows the construction of the service device 17. As shown in fig. 9, in the illustrated embodiment, the edge of the access door 18 is provided with a plurality of rotating handles 19, the cylinder 1 is provided with a plurality of catches 20 at corresponding positions, each rotating handle 19 corresponds to one catch 20, when the access door 18 is closed, the rotating handles 19 are pressed by the catches 20, so that the access door 18 is pressed against the access opening on the surface of the cylinder 1, the access opening is sealed, the materials in the cylinder 1 are prevented from leaking, when the access door 18 is to be opened, the rotating handles 19 are rotated to a position not pressed by the catches 20, the access door 18 is allowed to be opened, and the opening and closing operation of the access door 18 is convenient.

With continued reference to fig. 9, in the illustrated embodiment, the service device 17 further includes a travel switch 21, where the travel switch 21 is connected in series in a loop of a start switch of the dual-shaft paddle mixer, when the service door 18 is closed, the travel switch 21 is closed, the loop of the start switch of the dual-shaft paddle mixer is complete, the dual-shaft paddle mixer is started when the start switch is pressed, when the service door 18 is opened, the travel switch 21 is opened, the loop of the start switch of the dual-shaft paddle mixer is disconnected, the dual-shaft paddle mixer is not started when the start switch is pressed, the travel switch 21 enables the dual-shaft paddle mixer to be started only when the service door 18 is closed, the potential safety hazard of the start of the dual-shaft paddle mixer when the service door 18 is opened is eliminated, and safety is improved.

With continued reference to fig. 3, the dual-shaft paddle mixer further includes a top cover 22, the top cover 22 being positioned on top of the barrel 1, the periphery of the top cover 22 being bolted to the barrel 1. The top cover 22 is provided with an exhaust port 23 and a feed port 24, materials to be mixed enter the cylinder 1 from the feed port 24, and gases generated in the feeding and material mixing processes flow out of the cylinder 1 from the exhaust port 23.

With continued reference to fig. 6, the barrel 1 includes an end plate 25, and when the dual-shaft paddle mixer mixes building materials (e.g., dry powder mortar) having a high material specific gravity and a high friction coefficient, the materials are intensively mixed, the overall machine has a low overload resistance, and vibration is easily caused, resulting in deformation of the barrel 1, and in the illustrated embodiment, the end plate 25 is provided with a first reinforcing member (not shown in the drawings), which is illustratively a cross-shaped reinforcing rib, to improve the strength and rigidity of the end plate 25 and the barrel 1, to prevent vibration and displacement of the overall machine, and to prevent deformation of the end plate 25, and to improve the overload resistance of the overall machine.

With continued reference to fig. 4, the cartridge 1 further comprises a bottom plate 26, which bottom plate 26 is provided with second reinforcement members 27 in the illustrated embodiment, which promote the strength and rigidity of the bottom plate 26 and the cartridge 1, promote the carrying capacity of the cartridge 1, prevent vibration and displacement of the complete machine and deformation of the bottom plate 26, and improve the overload resistance of the complete machine. Illustratively, the base plate 26 has a double circular profile, and the second stiffener 27 is a stiffener plate that is positioned in a groove between the double circles, connecting the two circular portions, respectively. In another embodiment, the second stiffener 27 is another structure, such as a stiffener on the bottom plate 26.

With continued reference to fig. 6, in the illustrated embodiment, one or both of the end plates 25 are removable to facilitate maintenance of the structure of the stirring shaft 2 or the like inside the bowl 1, the removable end plates 25 being secured by bolts.

With continued reference to fig. 2, in the illustrated embodiment, the dual-axis paddle mixer is provided with standoffs 28, four standoffs 28 protruding from four corners of the dual-axis paddle mixer, threaded holes (not shown) are provided in standoffs 28, which are threadably connected to an installation base (e.g., a floor stand) and align the discharge port of the upstream device with the feed port 24 of the dual-axis paddle mixer, and also align the discharge device 14 of the dual-axis paddle mixer with the feed port of the downstream device, as a separate working unit, with a compact structure, small footprint, and convenient installation, use and maintenance.

With continued reference to fig. 2, in the illustrated embodiment, the dual-shaft paddle mixer further includes a crusher 29. Fig. 10 shows a left-hand structure of the crusher 29. As shown in fig. 10, the crusher 29 comprises a crushing hood 30 and a crushing shaft 31, the crushing hood 30 covering the upper side of the crushing shaft 31. Fig. 11 shows a front view of the crushing shaft 31. With further reference to fig. 11, a plurality of rows of crushing needles 32 are provided on the crushing shaft 31, the crushing shaft 31 rotates at a high speed, the material in the cylinder 1 is thrown up by the stirring members 3 on the rotating stirring shaft 2, and the crushing needles 32 on the rotating crushing shaft 31 are hit by the crushing needles 32. Fig. 12 shows a bottom view of the crush can 30. With further reference to fig. 12, the crushing hood 30 is provided with circular arc grooves 33 at corresponding positions of the crushing shaft 31, a plurality of rows of crushing rods 34, illustratively four rows of crushing rods 34 connected in front and back, are arranged in the circular arc grooves 33, and the material in the cylinder 1 is thrown up by the stirring piece 3 on the rotating stirring shaft 2, and also hits the crushing rods 34 in the circular arc grooves 33 of the crushing hood 30, and is hit by the crushing rods 34. The crushing needle 32 and the crushing rod 34 crush and deagglomerate the agglomerated material, assisting in the mixing of the material and achieving an optimal mixing of the material.

With continued reference to fig. 10 and 12, the crusher 29 comprises two crushing shafts 31, the crushing hood 30 is correspondingly provided with two circular arc grooves 33, the two crushing shafts 31 are staggered in the height direction, and correspondingly, the two circular arc grooves 33 are staggered in the height direction, so that the materials are concentrated and effectively crushed by the crushing shafts 31 in the circular arc grooves 33.

With continued reference to fig. 10, in the illustrated embodiment, the crushing hood 30 is rotatably fixed, one side (e.g., the left side in the drawing) of the crushing hood 30 is hinged to the two end plates 25 of the shell 1 to form a rotation axis, and the crushing hood 30 can be turned upwards around the rotation axis to enable the circular arc groove 33 and the crushing rod 34 which are originally directed downwards to be directed upwards, so that cleaning is facilitated.

With continued reference to fig. 11, in the illustrated embodiment the crushing shaft 31 is provided with screw bands 35 at both ends, the screw bands 35 being screwed in the same direction as the rotation direction of the crushing shaft 31. With further reference to fig. 2, the crushing shaft 31 is illustratively rotated counterclockwise, the left-hand screw band 35 of the crushing shaft 31 in fig. 11 is left-hand screw, the right-hand screw band 35 of the crushing shaft 31 in fig. 11 is right-hand screw, and when the crushing shaft 31 rotates counterclockwise, both screw bands 35 screw into the middle of the crushing shaft 31 to push the material into the drum 1, thereby preventing the material from rotating with the crushing shaft 31 to enter the bearings, motors, etc., and preventing the crusher 29 from being damaged.

With continued reference to fig. 6, in the illustrated embodiment, the stirring member 3 is a blade, further referring to fig. 4, the barrel 1 provides a gravity-free mixing space 36 above the middle of the two stirring shafts 2, further referring to fig. 5, the rotation directions of the two stirring shafts 2 are opposite, the materials form a flowing layer in the barrel 1, the materials in the flowing layer are mixed under the effect of a convection mixing principle, so that the materials generate strong convection and make the materials perform circumferential circulation motion to achieve the final mixing requirement, in addition, the materials are thrown up in the middle position of the two stirring shafts 2, the materials are instantly weightless in the middle position and the vertically upper region of the two stirring shafts 2, the centrifugal force is equal to the gravity, the motions of the materials in the instantly weightless state are irregular, the materials are mixed in the middle position and the vertically upper region of the two stirring shafts 2 in a gravity-free manner, the materials collide with each other, the materials are fully mixed, the uniform mixed materials are obtained in an extremely short time, the mixing time is short, the energy consumption is low, and the barrel 1 provides the gravity-free mixing space 36 above the middle of the two stirring shafts 2 for the materials to be mixed in a gravity-free manner.

With continued reference to fig. 6, in the illustrated embodiment, the stirring member 3 is a plate-like blade, the material is smoothly stirred by the plate-like blade, the material is sufficiently mixed by a gravity-free mixing process, the gravity-free mixing process is mild, the shearing action on the material is small, and the damage to the material is small.

With continued reference to fig. 4, in the illustrated embodiment, the gravity-free mixing space 36 narrows in a cross section perpendicular to the two stirring shafts 2 from bottom to top, reducing the space beyond the area above the middle of the two stirring shafts 2, reducing the space where the material does not lose weight instantaneously, the material thrown out by the stirring member 3 is more concentrated in the area above the middle of the two stirring shafts 2, and the area where the material loses weight instantaneously is larger. If the space where the material does not lose weight instantaneously increases, for example, the gravity-free mixing space 36 is a rectangular space which is not narrowed, the direction in which the material is thrown out by the stirring member 3 is more dispersed, the area where the material loses weight instantaneously is smaller, the area where the material is gravity-free mixed is smaller, the mixing effect is reduced, and the energy consumption of the double-shaft paddle mixer is increased.

With continued reference to fig. 4, in the illustrated embodiment, the gravity-free mixing space 36 has a generally trapezoidal cross-sectional shape with a wall 37 at an angle (designated a in the drawing) of 50-60 °, and illustratively 53-55 °, such that the amount of material that hits the wall 37 and is turned back is slightly greater than the material that is thrown up at a location intermediate the two mixer shafts 2.

Although the utility model has been described in terms of embodiments, it is not intended to be limited thereto, and variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the utility model.

Claims (10)

1. A twin-shaft paddle mixer, comprising:

two stirring shafts with initial phase difference;

an engine; and

the gear reducer comprises an input bevel gear, a driving shaft bevel gear and two groups of reduction gear sets, wherein the input bevel gear is meshed with the driving shaft bevel gear, and the driving shaft bevel gear is respectively meshed with the two groups of reduction gear sets;

the rotation output of the engine is transmitted to the input bevel gear, and the two groups of reduction gear sets respectively mesh with gears of one stirring shaft.

2. The twin-shaft paddle mixer of claim 1 wherein:

the gear reducer is a direct-connection reducer.

3. The dual shaft paddle mixer of claim 1 further comprising a barrel comprising an end plate provided with a stiffener.

4. The dual shaft paddle mixer of claim 1 further comprising a barrel comprising a bottom plate provided with a stiffener.

5. The twin-shaft paddle mixer of claim 1, further comprising a crusher comprising a crushing hood and a crushing shaft, the crushing hood being provided with crushing rods.

6. The dual-shaft paddle mixer of claim 5 wherein:

the crushing shaft is provided with a spiral belt at two ends, and the screwing direction of the spiral belt is the same as the rotation direction of the crushing shaft.

7. The dual-shaft paddle mixer of claim 5 wherein:

the crushing hood is rotatably fixed.

8. The dual-shaft paddle mixer of claim 1 further comprising a barrel providing a gravity-free mixing space above the middle of the two stirring shafts;

the two stirring shafts are provided with paddles.

9. The dual-shaft paddle mixer of claim 8 wherein:

the gravity-free mixing space is narrowed from bottom to top in a section perpendicular to the two stirring shafts.

10. The dual-shaft paddle mixer of claim 9 wherein:

the included angle between the wall surface of the gravity-free mixing space and the horizontal direction is 50-60 degrees.

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